1 /* Evaluate expressions for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008,
5 2009 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
27 #include "expression.h"
30 #include "language.h" /* For CAST_IS_CONVERSION */
31 #include "f-lang.h" /* for array bound stuff */
34 #include "objc-lang.h"
36 #include "parser-defs.h"
37 #include "cp-support.h"
39 #include "exceptions.h"
41 #include "user-regs.h"
43 #include "python/python.h"
45 #include "gdb_assert.h"
49 /* This is defined in valops.c */
50 extern int overload_resolution
;
52 /* Prototypes for local functions. */
54 static struct value
*evaluate_subexp_for_sizeof (struct expression
*, int *);
56 static struct value
*evaluate_subexp_for_address (struct expression
*,
59 static char *get_label (struct expression
*, int *);
61 static struct value
*evaluate_struct_tuple (struct value
*,
62 struct expression
*, int *,
65 static LONGEST
init_array_element (struct value
*, struct value
*,
66 struct expression
*, int *, enum noside
,
70 evaluate_subexp (struct type
*expect_type
, struct expression
*exp
,
71 int *pos
, enum noside noside
)
73 return (*exp
->language_defn
->la_exp_desc
->evaluate_exp
)
74 (expect_type
, exp
, pos
, noside
);
77 /* Parse the string EXP as a C expression, evaluate it,
78 and return the result as a number. */
81 parse_and_eval_address (char *exp
)
83 struct expression
*expr
= parse_expression (exp
);
85 struct cleanup
*old_chain
=
86 make_cleanup (free_current_contents
, &expr
);
88 addr
= value_as_address (evaluate_expression (expr
));
89 do_cleanups (old_chain
);
93 /* Like parse_and_eval_address but takes a pointer to a char * variable
94 and advanced that variable across the characters parsed. */
97 parse_and_eval_address_1 (char **expptr
)
99 struct expression
*expr
= parse_exp_1 (expptr
, (struct block
*) 0, 0);
101 struct cleanup
*old_chain
=
102 make_cleanup (free_current_contents
, &expr
);
104 addr
= value_as_address (evaluate_expression (expr
));
105 do_cleanups (old_chain
);
109 /* Like parse_and_eval_address, but treats the value of the expression
110 as an integer, not an address, returns a LONGEST, not a CORE_ADDR */
112 parse_and_eval_long (char *exp
)
114 struct expression
*expr
= parse_expression (exp
);
116 struct cleanup
*old_chain
=
117 make_cleanup (free_current_contents
, &expr
);
119 retval
= value_as_long (evaluate_expression (expr
));
120 do_cleanups (old_chain
);
125 parse_and_eval (char *exp
)
127 struct expression
*expr
= parse_expression (exp
);
129 struct cleanup
*old_chain
=
130 make_cleanup (free_current_contents
, &expr
);
132 val
= evaluate_expression (expr
);
133 do_cleanups (old_chain
);
137 /* Parse up to a comma (or to a closeparen)
138 in the string EXPP as an expression, evaluate it, and return the value.
139 EXPP is advanced to point to the comma. */
142 parse_to_comma_and_eval (char **expp
)
144 struct expression
*expr
= parse_exp_1 (expp
, (struct block
*) 0, 1);
146 struct cleanup
*old_chain
=
147 make_cleanup (free_current_contents
, &expr
);
149 val
= evaluate_expression (expr
);
150 do_cleanups (old_chain
);
154 /* Evaluate an expression in internal prefix form
155 such as is constructed by parse.y.
157 See expression.h for info on the format of an expression. */
160 evaluate_expression (struct expression
*exp
)
163 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_NORMAL
);
166 /* Evaluate an expression, avoiding all memory references
167 and getting a value whose type alone is correct. */
170 evaluate_type (struct expression
*exp
)
173 return evaluate_subexp (NULL_TYPE
, exp
, &pc
, EVAL_AVOID_SIDE_EFFECTS
);
176 /* Evaluate a subexpression, avoiding all memory references and
177 getting a value whose type alone is correct. */
180 evaluate_subexpression_type (struct expression
*exp
, int subexp
)
182 return evaluate_subexp (NULL_TYPE
, exp
, &subexp
, EVAL_AVOID_SIDE_EFFECTS
);
185 /* Extract a field operation from an expression. If the subexpression
186 of EXP starting at *SUBEXP is not a structure dereference
187 operation, return NULL. Otherwise, return the name of the
188 dereferenced field, and advance *SUBEXP to point to the
189 subexpression of the left-hand-side of the dereference. This is
190 used when completing field names. */
193 extract_field_op (struct expression
*exp
, int *subexp
)
197 if (exp
->elts
[*subexp
].opcode
!= STRUCTOP_STRUCT
198 && exp
->elts
[*subexp
].opcode
!= STRUCTOP_PTR
)
200 tem
= longest_to_int (exp
->elts
[*subexp
+ 1].longconst
);
201 result
= &exp
->elts
[*subexp
+ 2].string
;
202 (*subexp
) += 1 + 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
206 /* If the next expression is an OP_LABELED, skips past it,
207 returning the label. Otherwise, does nothing and returns NULL. */
210 get_label (struct expression
*exp
, int *pos
)
212 if (exp
->elts
[*pos
].opcode
== OP_LABELED
)
215 char *name
= &exp
->elts
[pc
+ 2].string
;
216 int tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
217 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
224 /* This function evaluates tuples (in (the deleted) Chill) or
225 brace-initializers (in C/C++) for structure types. */
227 static struct value
*
228 evaluate_struct_tuple (struct value
*struct_val
,
229 struct expression
*exp
,
230 int *pos
, enum noside noside
, int nargs
)
232 struct type
*struct_type
= check_typedef (value_type (struct_val
));
233 struct type
*substruct_type
= struct_type
;
234 struct type
*field_type
;
241 struct value
*val
= NULL
;
246 /* Skip past the labels, and count them. */
247 while (get_label (exp
, pos
) != NULL
)
252 char *label
= get_label (exp
, &pc
);
255 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
258 char *field_name
= TYPE_FIELD_NAME (struct_type
, fieldno
);
259 if (field_name
!= NULL
&& strcmp (field_name
, label
) == 0)
262 subfieldno
= fieldno
;
263 substruct_type
= struct_type
;
267 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
);
270 char *field_name
= TYPE_FIELD_NAME (struct_type
, fieldno
);
271 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
272 if ((field_name
== 0 || *field_name
== '\0')
273 && TYPE_CODE (field_type
) == TYPE_CODE_UNION
)
276 for (; variantno
< TYPE_NFIELDS (field_type
);
280 = TYPE_FIELD_TYPE (field_type
, variantno
);
281 if (TYPE_CODE (substruct_type
) == TYPE_CODE_STRUCT
)
284 subfieldno
< TYPE_NFIELDS (substruct_type
);
287 if (strcmp(TYPE_FIELD_NAME (substruct_type
,
298 error (_("there is no field named %s"), label
);
304 /* Unlabelled tuple element - go to next field. */
308 if (subfieldno
>= TYPE_NFIELDS (substruct_type
))
311 substruct_type
= struct_type
;
317 /* Skip static fields. */
318 while (fieldno
< TYPE_NFIELDS (struct_type
)
319 && field_is_static (&TYPE_FIELD (struct_type
,
322 subfieldno
= fieldno
;
323 if (fieldno
>= TYPE_NFIELDS (struct_type
))
324 error (_("too many initializers"));
325 field_type
= TYPE_FIELD_TYPE (struct_type
, fieldno
);
326 if (TYPE_CODE (field_type
) == TYPE_CODE_UNION
327 && TYPE_FIELD_NAME (struct_type
, fieldno
)[0] == '0')
328 error (_("don't know which variant you want to set"));
332 /* Here, struct_type is the type of the inner struct,
333 while substruct_type is the type of the inner struct.
334 These are the same for normal structures, but a variant struct
335 contains anonymous union fields that contain substruct fields.
336 The value fieldno is the index of the top-level (normal or
337 anonymous union) field in struct_field, while the value
338 subfieldno is the index of the actual real (named inner) field
339 in substruct_type. */
341 field_type
= TYPE_FIELD_TYPE (substruct_type
, subfieldno
);
343 val
= evaluate_subexp (field_type
, exp
, pos
, noside
);
345 /* Now actually set the field in struct_val. */
347 /* Assign val to field fieldno. */
348 if (value_type (val
) != field_type
)
349 val
= value_cast (field_type
, val
);
351 bitsize
= TYPE_FIELD_BITSIZE (substruct_type
, subfieldno
);
352 bitpos
= TYPE_FIELD_BITPOS (struct_type
, fieldno
);
354 bitpos
+= TYPE_FIELD_BITPOS (substruct_type
, subfieldno
);
355 addr
= value_contents_writeable (struct_val
) + bitpos
/ 8;
357 modify_field (addr
, value_as_long (val
),
358 bitpos
% 8, bitsize
);
360 memcpy (addr
, value_contents (val
),
361 TYPE_LENGTH (value_type (val
)));
363 while (--nlabels
> 0);
368 /* Recursive helper function for setting elements of array tuples for
369 (the deleted) Chill. The target is ARRAY (which has bounds
370 LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
371 and NOSIDE are as usual. Evaluates index expresions and sets the
372 specified element(s) of ARRAY to ELEMENT. Returns last index
376 init_array_element (struct value
*array
, struct value
*element
,
377 struct expression
*exp
, int *pos
,
378 enum noside noside
, LONGEST low_bound
, LONGEST high_bound
)
381 int element_size
= TYPE_LENGTH (value_type (element
));
382 if (exp
->elts
[*pos
].opcode
== BINOP_COMMA
)
385 init_array_element (array
, element
, exp
, pos
, noside
,
386 low_bound
, high_bound
);
387 return init_array_element (array
, element
,
388 exp
, pos
, noside
, low_bound
, high_bound
);
390 else if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
394 low
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
395 high
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
396 if (low
< low_bound
|| high
> high_bound
)
397 error (_("tuple range index out of range"));
398 for (index
= low
; index
<= high
; index
++)
400 memcpy (value_contents_raw (array
)
401 + (index
- low_bound
) * element_size
,
402 value_contents (element
), element_size
);
407 index
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
408 if (index
< low_bound
|| index
> high_bound
)
409 error (_("tuple index out of range"));
410 memcpy (value_contents_raw (array
) + (index
- low_bound
) * element_size
,
411 value_contents (element
), element_size
);
416 static struct value
*
417 value_f90_subarray (struct value
*array
,
418 struct expression
*exp
, int *pos
, enum noside noside
)
421 LONGEST low_bound
, high_bound
;
422 struct type
*range
= check_typedef (TYPE_INDEX_TYPE (value_type (array
)));
423 enum f90_range_type range_type
= longest_to_int (exp
->elts
[pc
].longconst
);
427 if (range_type
== LOW_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
428 low_bound
= TYPE_LOW_BOUND (range
);
430 low_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
432 if (range_type
== HIGH_BOUND_DEFAULT
|| range_type
== BOTH_BOUND_DEFAULT
)
433 high_bound
= TYPE_HIGH_BOUND (range
);
435 high_bound
= value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
437 return value_slice (array
, low_bound
, high_bound
- low_bound
+ 1);
441 /* Promote value ARG1 as appropriate before performing a unary operation
443 If the result is not appropriate for any particular language then it
444 needs to patch this function. */
447 unop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
452 *arg1
= coerce_ref (*arg1
);
453 type1
= check_typedef (value_type (*arg1
));
455 if (is_integral_type (type1
))
457 switch (language
->la_language
)
460 /* Perform integral promotion for ANSI C/C++.
461 If not appropropriate for any particular language
462 it needs to modify this function. */
464 struct type
*builtin_int
= builtin_type (gdbarch
)->builtin_int
;
465 if (TYPE_LENGTH (type1
) < TYPE_LENGTH (builtin_int
))
466 *arg1
= value_cast (builtin_int
, *arg1
);
473 /* Promote values ARG1 and ARG2 as appropriate before performing a binary
474 operation on those two operands.
475 If the result is not appropriate for any particular language then it
476 needs to patch this function. */
479 binop_promote (const struct language_defn
*language
, struct gdbarch
*gdbarch
,
480 struct value
**arg1
, struct value
**arg2
)
482 struct type
*promoted_type
= NULL
;
486 *arg1
= coerce_ref (*arg1
);
487 *arg2
= coerce_ref (*arg2
);
489 type1
= check_typedef (value_type (*arg1
));
490 type2
= check_typedef (value_type (*arg2
));
492 if ((TYPE_CODE (type1
) != TYPE_CODE_FLT
493 && TYPE_CODE (type1
) != TYPE_CODE_DECFLOAT
494 && !is_integral_type (type1
))
495 || (TYPE_CODE (type2
) != TYPE_CODE_FLT
496 && TYPE_CODE (type2
) != TYPE_CODE_DECFLOAT
497 && !is_integral_type (type2
)))
500 if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
501 || TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
)
503 /* No promotion required. */
505 else if (TYPE_CODE (type1
) == TYPE_CODE_FLT
506 || TYPE_CODE (type2
) == TYPE_CODE_FLT
)
508 switch (language
->la_language
)
514 /* No promotion required. */
518 /* For other languages the result type is unchanged from gdb
519 version 6.7 for backward compatibility.
520 If either arg was long double, make sure that value is also long
521 double. Otherwise use double. */
522 if (TYPE_LENGTH (type1
) * 8 > gdbarch_double_bit (gdbarch
)
523 || TYPE_LENGTH (type2
) * 8 > gdbarch_double_bit (gdbarch
))
524 promoted_type
= builtin_type (gdbarch
)->builtin_long_double
;
526 promoted_type
= builtin_type (gdbarch
)->builtin_double
;
530 else if (TYPE_CODE (type1
) == TYPE_CODE_BOOL
531 && TYPE_CODE (type2
) == TYPE_CODE_BOOL
)
533 /* No promotion required. */
536 /* Integral operations here. */
537 /* FIXME: Also mixed integral/booleans, with result an integer. */
539 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
540 unsigned int promoted_len1
= TYPE_LENGTH (type1
);
541 unsigned int promoted_len2
= TYPE_LENGTH (type2
);
542 int is_unsigned1
= TYPE_UNSIGNED (type1
);
543 int is_unsigned2
= TYPE_UNSIGNED (type2
);
544 unsigned int result_len
;
545 int unsigned_operation
;
547 /* Determine type length and signedness after promotion for
549 if (promoted_len1
< TYPE_LENGTH (builtin
->builtin_int
))
552 promoted_len1
= TYPE_LENGTH (builtin
->builtin_int
);
554 if (promoted_len2
< TYPE_LENGTH (builtin
->builtin_int
))
557 promoted_len2
= TYPE_LENGTH (builtin
->builtin_int
);
560 if (promoted_len1
> promoted_len2
)
562 unsigned_operation
= is_unsigned1
;
563 result_len
= promoted_len1
;
565 else if (promoted_len2
> promoted_len1
)
567 unsigned_operation
= is_unsigned2
;
568 result_len
= promoted_len2
;
572 unsigned_operation
= is_unsigned1
|| is_unsigned2
;
573 result_len
= promoted_len1
;
576 switch (language
->la_language
)
582 if (result_len
<= TYPE_LENGTH (builtin
->builtin_int
))
584 promoted_type
= (unsigned_operation
585 ? builtin
->builtin_unsigned_int
586 : builtin
->builtin_int
);
588 else if (result_len
<= TYPE_LENGTH (builtin
->builtin_long
))
590 promoted_type
= (unsigned_operation
591 ? builtin
->builtin_unsigned_long
592 : builtin
->builtin_long
);
596 promoted_type
= (unsigned_operation
597 ? builtin
->builtin_unsigned_long_long
598 : builtin
->builtin_long_long
);
603 /* For other languages the result type is unchanged from gdb
604 version 6.7 for backward compatibility.
605 If either arg was long long, make sure that value is also long
606 long. Otherwise use long. */
607 if (unsigned_operation
)
609 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
610 promoted_type
= builtin
->builtin_unsigned_long_long
;
612 promoted_type
= builtin
->builtin_unsigned_long
;
616 if (result_len
> gdbarch_long_bit (gdbarch
) / HOST_CHAR_BIT
)
617 promoted_type
= builtin
->builtin_long_long
;
619 promoted_type
= builtin
->builtin_long
;
627 /* Promote both operands to common type. */
628 *arg1
= value_cast (promoted_type
, *arg1
);
629 *arg2
= value_cast (promoted_type
, *arg2
);
634 ptrmath_type_p (struct type
*type
)
636 type
= check_typedef (type
);
637 if (TYPE_CODE (type
) == TYPE_CODE_REF
)
638 type
= TYPE_TARGET_TYPE (type
);
640 switch (TYPE_CODE (type
))
646 case TYPE_CODE_ARRAY
:
647 return current_language
->c_style_arrays
;
655 evaluate_subexp_standard (struct type
*expect_type
,
656 struct expression
*exp
, int *pos
,
661 int pc
, pc2
= 0, oldpos
;
662 struct value
*arg1
= NULL
;
663 struct value
*arg2
= NULL
;
667 struct value
**argvec
;
668 int upper
, lower
, retcode
;
672 struct type
**arg_types
;
676 op
= exp
->elts
[pc
].opcode
;
681 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
682 (*pos
) += 4 + BYTES_TO_EXP_ELEM (tem
+ 1);
683 if (noside
== EVAL_SKIP
)
685 arg1
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
686 &exp
->elts
[pc
+ 3].string
,
689 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
694 return value_from_longest (exp
->elts
[pc
+ 1].type
,
695 exp
->elts
[pc
+ 2].longconst
);
699 return value_from_double (exp
->elts
[pc
+ 1].type
,
700 exp
->elts
[pc
+ 2].doubleconst
);
704 return value_from_decfloat (exp
->elts
[pc
+ 1].type
,
705 exp
->elts
[pc
+ 2].decfloatconst
);
709 if (noside
== EVAL_SKIP
)
712 /* JYG: We used to just return value_zero of the symbol type
713 if we're asked to avoid side effects. Otherwise we return
714 value_of_variable (...). However I'm not sure if
715 value_of_variable () has any side effect.
716 We need a full value object returned here for whatis_exp ()
717 to call evaluate_type () and then pass the full value to
718 value_rtti_target_type () if we are dealing with a pointer
719 or reference to a base class and print object is on. */
722 volatile struct gdb_exception except
;
723 struct value
*ret
= NULL
;
725 TRY_CATCH (except
, RETURN_MASK_ERROR
)
727 ret
= value_of_variable (exp
->elts
[pc
+ 2].symbol
,
728 exp
->elts
[pc
+ 1].block
);
731 if (except
.reason
< 0)
733 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
734 ret
= value_zero (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
), not_lval
);
736 throw_exception (except
);
745 access_value_history (longest_to_int (exp
->elts
[pc
+ 1].longconst
));
749 const char *name
= &exp
->elts
[pc
+ 2].string
;
753 (*pos
) += 3 + BYTES_TO_EXP_ELEM (exp
->elts
[pc
+ 1].longconst
+ 1);
754 regno
= user_reg_map_name_to_regnum (exp
->gdbarch
,
755 name
, strlen (name
));
757 error (_("Register $%s not available."), name
);
759 /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return
760 a value with the appropriate register type. Unfortunately,
761 we don't have easy access to the type of user registers.
762 So for these registers, we fetch the register value regardless
763 of the evaluation mode. */
764 if (noside
== EVAL_AVOID_SIDE_EFFECTS
765 && regno
< gdbarch_num_regs (exp
->gdbarch
)
766 + gdbarch_num_pseudo_regs (exp
->gdbarch
))
767 val
= value_zero (register_type (exp
->gdbarch
, regno
), not_lval
);
769 val
= value_of_register (regno
, get_selected_frame (NULL
));
771 error (_("Value of register %s not available."), name
);
777 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
778 return value_from_longest (type
, exp
->elts
[pc
+ 1].longconst
);
782 return value_of_internalvar (exp
->gdbarch
,
783 exp
->elts
[pc
+ 1].internalvar
);
786 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
787 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
788 if (noside
== EVAL_SKIP
)
790 type
= language_string_char_type (exp
->language_defn
, exp
->gdbarch
);
791 return value_string (&exp
->elts
[pc
+ 2].string
, tem
, type
);
793 case OP_OBJC_NSSTRING
: /* Objective C Foundation Class NSString constant. */
794 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
795 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
796 if (noside
== EVAL_SKIP
)
800 return value_nsstring (exp
->gdbarch
, &exp
->elts
[pc
+ 2].string
, tem
+ 1);
803 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
805 += 3 + BYTES_TO_EXP_ELEM ((tem
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
);
806 if (noside
== EVAL_SKIP
)
808 return value_bitstring (&exp
->elts
[pc
+ 2].string
, tem
,
809 builtin_type (exp
->gdbarch
)->builtin_int
);
814 tem2
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
815 tem3
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
816 nargs
= tem3
- tem2
+ 1;
817 type
= expect_type
? check_typedef (expect_type
) : NULL_TYPE
;
819 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
820 && TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
822 struct value
*rec
= allocate_value (expect_type
);
823 memset (value_contents_raw (rec
), '\0', TYPE_LENGTH (type
));
824 return evaluate_struct_tuple (rec
, exp
, pos
, noside
, nargs
);
827 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
828 && TYPE_CODE (type
) == TYPE_CODE_ARRAY
)
830 struct type
*range_type
= TYPE_INDEX_TYPE (type
);
831 struct type
*element_type
= TYPE_TARGET_TYPE (type
);
832 struct value
*array
= allocate_value (expect_type
);
833 int element_size
= TYPE_LENGTH (check_typedef (element_type
));
834 LONGEST low_bound
, high_bound
, index
;
835 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
838 high_bound
= (TYPE_LENGTH (type
) / element_size
) - 1;
841 memset (value_contents_raw (array
), 0, TYPE_LENGTH (expect_type
));
842 for (tem
= nargs
; --nargs
>= 0;)
844 struct value
*element
;
846 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
849 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
851 element
= evaluate_subexp (element_type
, exp
, pos
, noside
);
852 if (value_type (element
) != element_type
)
853 element
= value_cast (element_type
, element
);
856 int continue_pc
= *pos
;
858 index
= init_array_element (array
, element
, exp
, pos
, noside
,
859 low_bound
, high_bound
);
864 if (index
> high_bound
)
865 /* to avoid memory corruption */
866 error (_("Too many array elements"));
867 memcpy (value_contents_raw (array
)
868 + (index
- low_bound
) * element_size
,
869 value_contents (element
),
877 if (expect_type
!= NULL_TYPE
&& noside
!= EVAL_SKIP
878 && TYPE_CODE (type
) == TYPE_CODE_SET
)
880 struct value
*set
= allocate_value (expect_type
);
881 gdb_byte
*valaddr
= value_contents_raw (set
);
882 struct type
*element_type
= TYPE_INDEX_TYPE (type
);
883 struct type
*check_type
= element_type
;
884 LONGEST low_bound
, high_bound
;
886 /* get targettype of elementtype */
887 while (TYPE_CODE (check_type
) == TYPE_CODE_RANGE
||
888 TYPE_CODE (check_type
) == TYPE_CODE_TYPEDEF
)
889 check_type
= TYPE_TARGET_TYPE (check_type
);
891 if (get_discrete_bounds (element_type
, &low_bound
, &high_bound
) < 0)
892 error (_("(power)set type with unknown size"));
893 memset (valaddr
, '\0', TYPE_LENGTH (type
));
894 for (tem
= 0; tem
< nargs
; tem
++)
896 LONGEST range_low
, range_high
;
897 struct type
*range_low_type
, *range_high_type
;
898 struct value
*elem_val
;
899 if (exp
->elts
[*pos
].opcode
== BINOP_RANGE
)
902 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
903 range_low_type
= value_type (elem_val
);
904 range_low
= value_as_long (elem_val
);
905 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
906 range_high_type
= value_type (elem_val
);
907 range_high
= value_as_long (elem_val
);
911 elem_val
= evaluate_subexp (element_type
, exp
, pos
, noside
);
912 range_low_type
= range_high_type
= value_type (elem_val
);
913 range_low
= range_high
= value_as_long (elem_val
);
915 /* check types of elements to avoid mixture of elements from
916 different types. Also check if type of element is "compatible"
917 with element type of powerset */
918 if (TYPE_CODE (range_low_type
) == TYPE_CODE_RANGE
)
919 range_low_type
= TYPE_TARGET_TYPE (range_low_type
);
920 if (TYPE_CODE (range_high_type
) == TYPE_CODE_RANGE
)
921 range_high_type
= TYPE_TARGET_TYPE (range_high_type
);
922 if ((TYPE_CODE (range_low_type
) != TYPE_CODE (range_high_type
)) ||
923 (TYPE_CODE (range_low_type
) == TYPE_CODE_ENUM
&&
924 (range_low_type
!= range_high_type
)))
925 /* different element modes */
926 error (_("POWERSET tuple elements of different mode"));
927 if ((TYPE_CODE (check_type
) != TYPE_CODE (range_low_type
)) ||
928 (TYPE_CODE (check_type
) == TYPE_CODE_ENUM
&&
929 range_low_type
!= check_type
))
930 error (_("incompatible POWERSET tuple elements"));
931 if (range_low
> range_high
)
933 warning (_("empty POWERSET tuple range"));
936 if (range_low
< low_bound
|| range_high
> high_bound
)
937 error (_("POWERSET tuple element out of range"));
938 range_low
-= low_bound
;
939 range_high
-= low_bound
;
940 for (; range_low
<= range_high
; range_low
++)
942 int bit_index
= (unsigned) range_low
% TARGET_CHAR_BIT
;
943 if (gdbarch_bits_big_endian (exp
->gdbarch
))
944 bit_index
= TARGET_CHAR_BIT
- 1 - bit_index
;
945 valaddr
[(unsigned) range_low
/ TARGET_CHAR_BIT
]
952 argvec
= (struct value
**) alloca (sizeof (struct value
*) * nargs
);
953 for (tem
= 0; tem
< nargs
; tem
++)
955 /* Ensure that array expressions are coerced into pointer objects. */
956 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
958 if (noside
== EVAL_SKIP
)
960 return value_array (tem2
, tem3
, argvec
);
964 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
966 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
968 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
969 if (noside
== EVAL_SKIP
)
971 return value_slice (array
, lowbound
, upper
- lowbound
+ 1);
974 case TERNOP_SLICE_COUNT
:
976 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
978 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
980 = value_as_long (evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
981 return value_slice (array
, lowbound
, length
);
985 /* Skip third and second args to evaluate the first one. */
986 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
987 if (value_logical_not (arg1
))
989 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
990 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
994 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
995 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
999 case OP_OBJC_SELECTOR
:
1000 { /* Objective C @selector operator. */
1001 char *sel
= &exp
->elts
[pc
+ 2].string
;
1002 int len
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1003 struct type
*selector_type
;
1005 (*pos
) += 3 + BYTES_TO_EXP_ELEM (len
+ 1);
1006 if (noside
== EVAL_SKIP
)
1010 sel
[len
] = 0; /* Make sure it's terminated. */
1012 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1013 return value_from_longest (selector_type
,
1014 lookup_child_selector (exp
->gdbarch
, sel
));
1017 case OP_OBJC_MSGCALL
:
1018 { /* Objective C message (method) call. */
1020 CORE_ADDR responds_selector
= 0;
1021 CORE_ADDR method_selector
= 0;
1023 CORE_ADDR selector
= 0;
1025 int struct_return
= 0;
1026 int sub_no_side
= 0;
1028 struct value
*msg_send
= NULL
;
1029 struct value
*msg_send_stret
= NULL
;
1030 int gnu_runtime
= 0;
1032 struct value
*target
= NULL
;
1033 struct value
*method
= NULL
;
1034 struct value
*called_method
= NULL
;
1036 struct type
*selector_type
= NULL
;
1037 struct type
*long_type
;
1039 struct value
*ret
= NULL
;
1042 selector
= exp
->elts
[pc
+ 1].longconst
;
1043 nargs
= exp
->elts
[pc
+ 2].longconst
;
1044 argvec
= (struct value
**) alloca (sizeof (struct value
*)
1049 long_type
= builtin_type (exp
->gdbarch
)->builtin_long
;
1050 selector_type
= builtin_type (exp
->gdbarch
)->builtin_data_ptr
;
1052 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1053 sub_no_side
= EVAL_NORMAL
;
1055 sub_no_side
= noside
;
1057 target
= evaluate_subexp (selector_type
, exp
, pos
, sub_no_side
);
1059 if (value_as_long (target
) == 0)
1060 return value_from_longest (long_type
, 0);
1062 if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
1065 /* Find the method dispatch (Apple runtime) or method lookup
1066 (GNU runtime) function for Objective-C. These will be used
1067 to lookup the symbol information for the method. If we
1068 can't find any symbol information, then we'll use these to
1069 call the method, otherwise we can call the method
1070 directly. The msg_send_stret function is used in the special
1071 case of a method that returns a structure (Apple runtime
1075 struct type
*type
= selector_type
;
1076 type
= lookup_function_type (type
);
1077 type
= lookup_pointer_type (type
);
1078 type
= lookup_function_type (type
);
1079 type
= lookup_pointer_type (type
);
1081 msg_send
= find_function_in_inferior ("objc_msg_lookup", NULL
);
1083 = find_function_in_inferior ("objc_msg_lookup", NULL
);
1085 msg_send
= value_from_pointer (type
, value_as_address (msg_send
));
1086 msg_send_stret
= value_from_pointer (type
,
1087 value_as_address (msg_send_stret
));
1091 msg_send
= find_function_in_inferior ("objc_msgSend", NULL
);
1092 /* Special dispatcher for methods returning structs */
1094 = find_function_in_inferior ("objc_msgSend_stret", NULL
);
1097 /* Verify the target object responds to this method. The
1098 standard top-level 'Object' class uses a different name for
1099 the verification method than the non-standard, but more
1100 often used, 'NSObject' class. Make sure we check for both. */
1103 = lookup_child_selector (exp
->gdbarch
, "respondsToSelector:");
1104 if (responds_selector
== 0)
1106 = lookup_child_selector (exp
->gdbarch
, "respondsTo:");
1108 if (responds_selector
== 0)
1109 error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
1112 = lookup_child_selector (exp
->gdbarch
, "methodForSelector:");
1113 if (method_selector
== 0)
1115 = lookup_child_selector (exp
->gdbarch
, "methodFor:");
1117 if (method_selector
== 0)
1118 error (_("no 'methodFor:' or 'methodForSelector:' method"));
1120 /* Call the verification method, to make sure that the target
1121 class implements the desired method. */
1123 argvec
[0] = msg_send
;
1125 argvec
[2] = value_from_longest (long_type
, responds_selector
);
1126 argvec
[3] = value_from_longest (long_type
, selector
);
1129 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1132 /* Function objc_msg_lookup returns a pointer. */
1134 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1136 if (value_as_long (ret
) == 0)
1137 error (_("Target does not respond to this message selector."));
1139 /* Call "methodForSelector:" method, to get the address of a
1140 function method that implements this selector for this
1141 class. If we can find a symbol at that address, then we
1142 know the return type, parameter types etc. (that's a good
1145 argvec
[0] = msg_send
;
1147 argvec
[2] = value_from_longest (long_type
, method_selector
);
1148 argvec
[3] = value_from_longest (long_type
, selector
);
1151 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1155 ret
= call_function_by_hand (argvec
[0], 3, argvec
+ 1);
1158 /* ret should now be the selector. */
1160 addr
= value_as_long (ret
);
1163 struct symbol
*sym
= NULL
;
1164 /* Is it a high_level symbol? */
1166 sym
= find_pc_function (addr
);
1168 method
= value_of_variable (sym
, 0);
1171 /* If we found a method with symbol information, check to see
1172 if it returns a struct. Otherwise assume it doesn't. */
1178 struct type
*val_type
;
1180 funaddr
= find_function_addr (method
, &val_type
);
1182 b
= block_for_pc (funaddr
);
1184 CHECK_TYPEDEF (val_type
);
1186 if ((val_type
== NULL
)
1187 || (TYPE_CODE(val_type
) == TYPE_CODE_ERROR
))
1189 if (expect_type
!= NULL
)
1190 val_type
= expect_type
;
1193 struct_return
= using_struct_return (exp
->gdbarch
,
1194 value_type (method
), val_type
);
1196 else if (expect_type
!= NULL
)
1198 struct_return
= using_struct_return (exp
->gdbarch
, NULL
,
1199 check_typedef (expect_type
));
1202 /* Found a function symbol. Now we will substitute its
1203 value in place of the message dispatcher (obj_msgSend),
1204 so that we call the method directly instead of thru
1205 the dispatcher. The main reason for doing this is that
1206 we can now evaluate the return value and parameter values
1207 according to their known data types, in case we need to
1208 do things like promotion, dereferencing, special handling
1209 of structs and doubles, etc.
1211 We want to use the type signature of 'method', but still
1212 jump to objc_msgSend() or objc_msgSend_stret() to better
1213 mimic the behavior of the runtime. */
1217 if (TYPE_CODE (value_type (method
)) != TYPE_CODE_FUNC
)
1218 error (_("method address has symbol information with non-function type; skipping"));
1220 set_value_address (method
, value_as_address (msg_send_stret
));
1222 set_value_address (method
, value_as_address (msg_send
));
1223 called_method
= method
;
1228 called_method
= msg_send_stret
;
1230 called_method
= msg_send
;
1233 if (noside
== EVAL_SKIP
)
1236 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1238 /* If the return type doesn't look like a function type,
1239 call an error. This can happen if somebody tries to
1240 turn a variable into a function call. This is here
1241 because people often want to call, eg, strcmp, which
1242 gdb doesn't know is a function. If gdb isn't asked for
1243 it's opinion (ie. through "whatis"), it won't offer
1246 struct type
*type
= value_type (called_method
);
1247 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1248 type
= TYPE_TARGET_TYPE (type
);
1249 type
= TYPE_TARGET_TYPE (type
);
1253 if ((TYPE_CODE (type
) == TYPE_CODE_ERROR
) && expect_type
)
1254 return allocate_value (expect_type
);
1256 return allocate_value (type
);
1259 error (_("Expression of type other than \"method returning ...\" used as a method"));
1262 /* Now depending on whether we found a symbol for the method,
1263 we will either call the runtime dispatcher or the method
1266 argvec
[0] = called_method
;
1268 argvec
[2] = value_from_longest (long_type
, selector
);
1269 /* User-supplied arguments. */
1270 for (tem
= 0; tem
< nargs
; tem
++)
1271 argvec
[tem
+ 3] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1272 argvec
[tem
+ 3] = 0;
1274 if (gnu_runtime
&& (method
!= NULL
))
1276 /* Function objc_msg_lookup returns a pointer. */
1277 deprecated_set_value_type (argvec
[0],
1278 lookup_function_type (lookup_pointer_type (value_type (argvec
[0]))));
1279 argvec
[0] = call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1282 ret
= call_function_by_hand (argvec
[0], nargs
+ 2, argvec
+ 1);
1289 op
= exp
->elts
[*pos
].opcode
;
1290 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1291 /* Allocate arg vector, including space for the function to be
1292 called in argvec[0] and a terminating NULL */
1293 argvec
= (struct value
**) alloca (sizeof (struct value
*) * (nargs
+ 3));
1294 if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1297 /* First, evaluate the structure into arg2 */
1300 if (noside
== EVAL_SKIP
)
1303 if (op
== STRUCTOP_MEMBER
)
1305 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1309 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1312 /* If the function is a virtual function, then the
1313 aggregate value (providing the structure) plays
1314 its part by providing the vtable. Otherwise,
1315 it is just along for the ride: call the function
1318 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1320 if (TYPE_CODE (check_typedef (value_type (arg1
)))
1321 != TYPE_CODE_METHODPTR
)
1322 error (_("Non-pointer-to-member value used in pointer-to-member "
1325 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1327 struct type
*method_type
= check_typedef (value_type (arg1
));
1328 arg1
= value_zero (method_type
, not_lval
);
1331 arg1
= cplus_method_ptr_to_value (&arg2
, arg1
);
1333 /* Now, say which argument to start evaluating from */
1336 else if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
)
1338 /* Hair for method invocations */
1342 /* First, evaluate the structure into arg2 */
1344 tem2
= longest_to_int (exp
->elts
[pc2
+ 1].longconst
);
1345 *pos
+= 3 + BYTES_TO_EXP_ELEM (tem2
+ 1);
1346 if (noside
== EVAL_SKIP
)
1349 if (op
== STRUCTOP_STRUCT
)
1351 /* If v is a variable in a register, and the user types
1352 v.method (), this will produce an error, because v has
1355 A possible way around this would be to allocate a
1356 copy of the variable on the stack, copy in the
1357 contents, call the function, and copy out the
1358 contents. I.e. convert this from call by reference
1359 to call by copy-return (or whatever it's called).
1360 However, this does not work because it is not the
1361 same: the method being called could stash a copy of
1362 the address, and then future uses through that address
1363 (after the method returns) would be expected to
1364 use the variable itself, not some copy of it. */
1365 arg2
= evaluate_subexp_for_address (exp
, pos
, noside
);
1369 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1371 /* Now, say which argument to start evaluating from */
1376 /* Non-method function call */
1378 argvec
[0] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1380 type
= value_type (argvec
[0]);
1381 if (type
&& TYPE_CODE (type
) == TYPE_CODE_PTR
)
1382 type
= TYPE_TARGET_TYPE (type
);
1383 if (type
&& TYPE_CODE (type
) == TYPE_CODE_FUNC
)
1385 for (; tem
<= nargs
&& tem
<= TYPE_NFIELDS (type
); tem
++)
1387 /* pai: FIXME This seems to be coercing arguments before
1388 * overload resolution has been done! */
1389 argvec
[tem
] = evaluate_subexp (TYPE_FIELD_TYPE (type
, tem
- 1),
1395 /* Evaluate arguments */
1396 for (; tem
<= nargs
; tem
++)
1398 /* Ensure that array expressions are coerced into pointer objects. */
1399 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1402 /* signal end of arglist */
1405 if (op
== STRUCTOP_STRUCT
|| op
== STRUCTOP_PTR
)
1407 int static_memfuncp
;
1410 /* Method invocation : stuff "this" as first parameter */
1412 /* Name of method from expression */
1413 strcpy (tstr
, &exp
->elts
[pc2
+ 2].string
);
1415 if (overload_resolution
&& (exp
->language_defn
->la_language
== language_cplus
))
1417 /* Language is C++, do some overload resolution before evaluation */
1418 struct value
*valp
= NULL
;
1420 /* Prepare list of argument types for overload resolution */
1421 arg_types
= (struct type
**) alloca (nargs
* (sizeof (struct type
*)));
1422 for (ix
= 1; ix
<= nargs
; ix
++)
1423 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1425 (void) find_overload_match (arg_types
, nargs
, tstr
,
1426 1 /* method */ , 0 /* strict match */ ,
1427 &arg2
/* the object */ , NULL
,
1428 &valp
, NULL
, &static_memfuncp
);
1431 argvec
[1] = arg2
; /* the ``this'' pointer */
1432 argvec
[0] = valp
; /* use the method found after overload resolution */
1435 /* Non-C++ case -- or no overload resolution */
1437 struct value
*temp
= arg2
;
1438 argvec
[0] = value_struct_elt (&temp
, argvec
+ 1, tstr
,
1440 op
== STRUCTOP_STRUCT
1441 ? "structure" : "structure pointer");
1442 /* value_struct_elt updates temp with the correct value
1443 of the ``this'' pointer if necessary, so modify argvec[1] to
1444 reflect any ``this'' changes. */
1445 arg2
= value_from_longest (lookup_pointer_type(value_type (temp
)),
1446 value_address (temp
)
1447 + value_embedded_offset (temp
));
1448 argvec
[1] = arg2
; /* the ``this'' pointer */
1451 if (static_memfuncp
)
1453 argvec
[1] = argvec
[0];
1458 else if (op
== STRUCTOP_MEMBER
|| op
== STRUCTOP_MPTR
)
1463 else if (op
== OP_VAR_VALUE
)
1465 /* Non-member function being called */
1466 /* fn: This can only be done for C++ functions. A C-style function
1467 in a C++ program, for instance, does not have the fields that
1468 are expected here */
1470 if (overload_resolution
&& (exp
->language_defn
->la_language
== language_cplus
))
1472 /* Language is C++, do some overload resolution before evaluation */
1473 struct symbol
*symp
;
1475 /* Prepare list of argument types for overload resolution */
1476 arg_types
= (struct type
**) alloca (nargs
* (sizeof (struct type
*)));
1477 for (ix
= 1; ix
<= nargs
; ix
++)
1478 arg_types
[ix
- 1] = value_type (argvec
[ix
]);
1480 (void) find_overload_match (arg_types
, nargs
, NULL
/* no need for name */ ,
1481 0 /* not method */ , 0 /* strict match */ ,
1482 NULL
, exp
->elts
[save_pos1
+2].symbol
/* the function */ ,
1485 /* Now fix the expression being evaluated */
1486 exp
->elts
[save_pos1
+2].symbol
= symp
;
1487 argvec
[0] = evaluate_subexp_with_coercion (exp
, &save_pos1
, noside
);
1491 /* Not C++, or no overload resolution allowed */
1492 /* nothing to be done; argvec already correctly set up */
1497 /* It is probably a C-style function */
1498 /* nothing to be done; argvec already correctly set up */
1503 if (noside
== EVAL_SKIP
)
1505 if (argvec
[0] == NULL
)
1506 error (_("Cannot evaluate function -- may be inlined"));
1507 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1509 /* If the return type doesn't look like a function type, call an
1510 error. This can happen if somebody tries to turn a variable into
1511 a function call. This is here because people often want to
1512 call, eg, strcmp, which gdb doesn't know is a function. If
1513 gdb isn't asked for it's opinion (ie. through "whatis"),
1514 it won't offer it. */
1516 struct type
*ftype
=
1517 TYPE_TARGET_TYPE (value_type (argvec
[0]));
1520 return allocate_value (TYPE_TARGET_TYPE (value_type (argvec
[0])));
1522 error (_("Expression of type other than \"Function returning ...\" used as function"));
1524 if (TYPE_CODE (value_type (argvec
[0])) == TYPE_CODE_INTERNAL_FUNCTION
)
1525 return call_internal_function (argvec
[0], nargs
, argvec
+ 1);
1527 return call_function_by_hand (argvec
[0], nargs
, argvec
+ 1);
1528 /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
1530 case OP_F77_UNDETERMINED_ARGLIST
:
1532 /* Remember that in F77, functions, substring ops and
1533 array subscript operations cannot be disambiguated
1534 at parse time. We have made all array subscript operations,
1535 substring operations as well as function calls come here
1536 and we now have to discover what the heck this thing actually was.
1537 If it is a function, we process just as if we got an OP_FUNCALL. */
1539 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1542 /* First determine the type code we are dealing with. */
1543 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1544 type
= check_typedef (value_type (arg1
));
1545 code
= TYPE_CODE (type
);
1547 if (code
== TYPE_CODE_PTR
)
1549 /* Fortran always passes variable to subroutines as pointer.
1550 So we need to look into its target type to see if it is
1551 array, string or function. If it is, we need to switch
1552 to the target value the original one points to. */
1553 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1555 if (TYPE_CODE (target_type
) == TYPE_CODE_ARRAY
1556 || TYPE_CODE (target_type
) == TYPE_CODE_STRING
1557 || TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
1559 arg1
= value_ind (arg1
);
1560 type
= check_typedef (value_type (arg1
));
1561 code
= TYPE_CODE (type
);
1567 case TYPE_CODE_ARRAY
:
1568 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1569 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1571 goto multi_f77_subscript
;
1573 case TYPE_CODE_STRING
:
1574 if (exp
->elts
[*pos
].opcode
== OP_F90_RANGE
)
1575 return value_f90_subarray (arg1
, exp
, pos
, noside
);
1578 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1579 return value_subscript (arg1
, value_as_long (arg2
));
1583 case TYPE_CODE_FUNC
:
1584 /* It's a function call. */
1585 /* Allocate arg vector, including space for the function to be
1586 called in argvec[0] and a terminating NULL */
1587 argvec
= (struct value
**) alloca (sizeof (struct value
*) * (nargs
+ 2));
1590 for (; tem
<= nargs
; tem
++)
1591 argvec
[tem
] = evaluate_subexp_with_coercion (exp
, pos
, noside
);
1592 argvec
[tem
] = 0; /* signal end of arglist */
1596 error (_("Cannot perform substring on this type"));
1600 /* We have a complex number, There should be 2 floating
1601 point numbers that compose it */
1603 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1604 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1606 return value_literal_complex (arg1
, arg2
, exp
->elts
[pc
+ 1].type
);
1608 case STRUCTOP_STRUCT
:
1609 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1610 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1611 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1612 if (noside
== EVAL_SKIP
)
1614 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1615 return value_zero (lookup_struct_elt_type (value_type (arg1
),
1616 &exp
->elts
[pc
+ 2].string
,
1621 struct value
*temp
= arg1
;
1622 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
1627 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1628 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
1629 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1630 if (noside
== EVAL_SKIP
)
1633 /* JYG: if print object is on we need to replace the base type
1634 with rtti type in order to continue on with successful
1635 lookup of member / method only available in the rtti type. */
1637 struct type
*type
= value_type (arg1
);
1638 struct type
*real_type
;
1639 int full
, top
, using_enc
;
1640 struct value_print_options opts
;
1642 get_user_print_options (&opts
);
1643 if (opts
.objectprint
&& TYPE_TARGET_TYPE(type
) &&
1644 (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_CLASS
))
1646 real_type
= value_rtti_target_type (arg1
, &full
, &top
, &using_enc
);
1649 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
1650 real_type
= lookup_pointer_type (real_type
);
1652 real_type
= lookup_reference_type (real_type
);
1654 arg1
= value_cast (real_type
, arg1
);
1659 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1660 return value_zero (lookup_struct_elt_type (value_type (arg1
),
1661 &exp
->elts
[pc
+ 2].string
,
1666 struct value
*temp
= arg1
;
1667 return value_struct_elt (&temp
, NULL
, &exp
->elts
[pc
+ 2].string
,
1668 NULL
, "structure pointer");
1671 case STRUCTOP_MEMBER
:
1673 if (op
== STRUCTOP_MEMBER
)
1674 arg1
= evaluate_subexp_for_address (exp
, pos
, noside
);
1676 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1678 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1680 if (noside
== EVAL_SKIP
)
1683 type
= check_typedef (value_type (arg2
));
1684 switch (TYPE_CODE (type
))
1686 case TYPE_CODE_METHODPTR
:
1687 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1688 return value_zero (TYPE_TARGET_TYPE (type
), not_lval
);
1691 arg2
= cplus_method_ptr_to_value (&arg1
, arg2
);
1692 gdb_assert (TYPE_CODE (value_type (arg2
)) == TYPE_CODE_PTR
);
1693 return value_ind (arg2
);
1696 case TYPE_CODE_MEMBERPTR
:
1697 /* Now, convert these values to an address. */
1698 arg1
= value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type
)),
1701 mem_offset
= value_as_long (arg2
);
1703 arg3
= value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
1704 value_as_long (arg1
) + mem_offset
);
1705 return value_ind (arg3
);
1708 error (_("non-pointer-to-member value used in pointer-to-member construct"));
1712 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1713 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1714 if (noside
== EVAL_SKIP
)
1716 if (binop_user_defined_p (op
, arg1
, arg2
))
1717 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1719 return value_concat (arg1
, arg2
);
1722 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1723 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
1725 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
1727 if (binop_user_defined_p (op
, arg1
, arg2
))
1728 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1730 return value_assign (arg1
, arg2
);
1732 case BINOP_ASSIGN_MODIFY
:
1734 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1735 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
1736 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
1738 op
= exp
->elts
[pc
+ 1].opcode
;
1739 if (binop_user_defined_p (op
, arg1
, arg2
))
1740 return value_x_binop (arg1
, arg2
, BINOP_ASSIGN_MODIFY
, op
, noside
);
1741 else if (op
== BINOP_ADD
&& ptrmath_type_p (value_type (arg1
))
1742 && is_integral_type (value_type (arg2
)))
1743 arg2
= value_ptradd (arg1
, value_as_long (arg2
));
1744 else if (op
== BINOP_SUB
&& ptrmath_type_p (value_type (arg1
))
1745 && is_integral_type (value_type (arg2
)))
1746 arg2
= value_ptradd (arg1
, - value_as_long (arg2
));
1749 struct value
*tmp
= arg1
;
1751 /* For shift and integer exponentiation operations,
1752 only promote the first argument. */
1753 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
1754 && is_integral_type (value_type (arg2
)))
1755 unop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
);
1757 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
1759 arg2
= value_binop (tmp
, arg2
, op
);
1761 return value_assign (arg1
, arg2
);
1764 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1765 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1766 if (noside
== EVAL_SKIP
)
1768 if (binop_user_defined_p (op
, arg1
, arg2
))
1769 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1770 else if (ptrmath_type_p (value_type (arg1
))
1771 && is_integral_type (value_type (arg2
)))
1772 return value_ptradd (arg1
, value_as_long (arg2
));
1773 else if (ptrmath_type_p (value_type (arg2
))
1774 && is_integral_type (value_type (arg1
)))
1775 return value_ptradd (arg2
, value_as_long (arg1
));
1778 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
1779 return value_binop (arg1
, arg2
, BINOP_ADD
);
1783 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1784 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1785 if (noside
== EVAL_SKIP
)
1787 if (binop_user_defined_p (op
, arg1
, arg2
))
1788 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1789 else if (ptrmath_type_p (value_type (arg1
))
1790 && ptrmath_type_p (value_type (arg2
)))
1792 /* FIXME -- should be ptrdiff_t */
1793 type
= builtin_type (exp
->gdbarch
)->builtin_long
;
1794 return value_from_longest (type
, value_ptrdiff (arg1
, arg2
));
1796 else if (ptrmath_type_p (value_type (arg1
))
1797 && is_integral_type (value_type (arg2
)))
1798 return value_ptradd (arg1
, - value_as_long (arg2
));
1801 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
1802 return value_binop (arg1
, arg2
, BINOP_SUB
);
1813 case BINOP_BITWISE_AND
:
1814 case BINOP_BITWISE_IOR
:
1815 case BINOP_BITWISE_XOR
:
1816 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1817 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1818 if (noside
== EVAL_SKIP
)
1820 if (binop_user_defined_p (op
, arg1
, arg2
))
1821 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1824 /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero,
1825 fudge arg2 to avoid division-by-zero, the caller is
1826 (theoretically) only looking for the type of the result. */
1827 if (noside
== EVAL_AVOID_SIDE_EFFECTS
1828 /* ??? Do we really want to test for BINOP_MOD here?
1829 The implementation of value_binop gives it a well-defined
1832 || op
== BINOP_INTDIV
1835 && value_logical_not (arg2
))
1837 struct value
*v_one
, *retval
;
1839 v_one
= value_one (value_type (arg2
), not_lval
);
1840 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &v_one
);
1841 retval
= value_binop (arg1
, v_one
, op
);
1846 /* For shift and integer exponentiation operations,
1847 only promote the first argument. */
1848 if ((op
== BINOP_LSH
|| op
== BINOP_RSH
|| op
== BINOP_EXP
)
1849 && is_integral_type (value_type (arg2
)))
1850 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
1852 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
1854 return value_binop (arg1
, arg2
, op
);
1859 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1860 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
1861 if (noside
== EVAL_SKIP
)
1863 error (_("':' operator used in invalid context"));
1865 case BINOP_SUBSCRIPT
:
1866 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1867 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1868 if (noside
== EVAL_SKIP
)
1870 if (binop_user_defined_p (op
, arg1
, arg2
))
1871 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1874 /* If the user attempts to subscript something that is not an
1875 array or pointer type (like a plain int variable for example),
1876 then report this as an error. */
1878 arg1
= coerce_ref (arg1
);
1879 type
= check_typedef (value_type (arg1
));
1880 if (TYPE_CODE (type
) != TYPE_CODE_ARRAY
1881 && TYPE_CODE (type
) != TYPE_CODE_PTR
)
1883 if (TYPE_NAME (type
))
1884 error (_("cannot subscript something of type `%s'"),
1887 error (_("cannot subscript requested type"));
1890 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1891 return value_zero (TYPE_TARGET_TYPE (type
), VALUE_LVAL (arg1
));
1893 return value_subscript (arg1
, value_as_long (arg2
));
1897 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1898 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1899 if (noside
== EVAL_SKIP
)
1901 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
1902 return value_from_longest (type
, (LONGEST
) value_in (arg1
, arg2
));
1904 case MULTI_SUBSCRIPT
:
1906 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
1907 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1910 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
1911 /* FIXME: EVAL_SKIP handling may not be correct. */
1912 if (noside
== EVAL_SKIP
)
1923 /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
1924 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
1926 /* If the user attempts to subscript something that has no target
1927 type (like a plain int variable for example), then report this
1930 type
= TYPE_TARGET_TYPE (check_typedef (value_type (arg1
)));
1933 arg1
= value_zero (type
, VALUE_LVAL (arg1
));
1939 error (_("cannot subscript something of type `%s'"),
1940 TYPE_NAME (value_type (arg1
)));
1944 if (binop_user_defined_p (op
, arg1
, arg2
))
1946 arg1
= value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
1950 arg1
= coerce_ref (arg1
);
1951 type
= check_typedef (value_type (arg1
));
1953 switch (TYPE_CODE (type
))
1956 case TYPE_CODE_ARRAY
:
1957 case TYPE_CODE_STRING
:
1958 arg1
= value_subscript (arg1
, value_as_long (arg2
));
1961 case TYPE_CODE_BITSTRING
:
1962 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
1963 arg1
= value_bitstring_subscript (type
, arg1
,
1964 value_as_long (arg2
));
1968 if (TYPE_NAME (type
))
1969 error (_("cannot subscript something of type `%s'"),
1972 error (_("cannot subscript requested type"));
1978 multi_f77_subscript
:
1980 int subscript_array
[MAX_FORTRAN_DIMS
];
1981 int array_size_array
[MAX_FORTRAN_DIMS
];
1982 int ndimensions
= 1, i
;
1983 struct type
*tmp_type
;
1984 int offset_item
; /* The array offset where the item lives */
1986 if (nargs
> MAX_FORTRAN_DIMS
)
1987 error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS
);
1989 tmp_type
= check_typedef (value_type (arg1
));
1990 ndimensions
= calc_f77_array_dims (type
);
1992 if (nargs
!= ndimensions
)
1993 error (_("Wrong number of subscripts"));
1995 gdb_assert (nargs
> 0);
1997 /* Now that we know we have a legal array subscript expression
1998 let us actually find out where this element exists in the array. */
2001 /* Take array indices left to right */
2002 for (i
= 0; i
< nargs
; i
++)
2004 /* Evaluate each subscript, It must be a legal integer in F77 */
2005 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
2007 /* Fill in the subscript and array size arrays */
2009 subscript_array
[i
] = value_as_long (arg2
);
2012 /* Internal type of array is arranged right to left */
2013 for (i
= 0; i
< nargs
; i
++)
2015 upper
= f77_get_upperbound (tmp_type
);
2016 lower
= f77_get_lowerbound (tmp_type
);
2018 array_size_array
[nargs
- i
- 1] = upper
- lower
+ 1;
2020 /* Zero-normalize subscripts so that offsetting will work. */
2022 subscript_array
[nargs
- i
- 1] -= lower
;
2024 /* If we are at the bottom of a multidimensional
2025 array type then keep a ptr to the last ARRAY
2026 type around for use when calling value_subscript()
2027 below. This is done because we pretend to value_subscript
2028 that we actually have a one-dimensional array
2029 of base element type that we apply a simple
2033 tmp_type
= check_typedef (TYPE_TARGET_TYPE (tmp_type
));
2036 /* Now let us calculate the offset for this item */
2038 offset_item
= subscript_array
[ndimensions
- 1];
2040 for (i
= ndimensions
- 1; i
> 0; --i
)
2042 array_size_array
[i
- 1] * offset_item
+ subscript_array
[i
- 1];
2044 /* Let us now play a dirty trick: we will take arg1
2045 which is a value node pointing to the topmost level
2046 of the multidimensional array-set and pretend
2047 that it is actually a array of the final element
2048 type, this will ensure that value_subscript()
2049 returns the correct type value */
2051 deprecated_set_value_type (arg1
, tmp_type
);
2052 return value_subscripted_rvalue (arg1
, offset_item
, 0);
2055 case BINOP_LOGICAL_AND
:
2056 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2057 if (noside
== EVAL_SKIP
)
2059 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2064 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2067 if (binop_user_defined_p (op
, arg1
, arg2
))
2069 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2070 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2074 tem
= value_logical_not (arg1
);
2075 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2076 (tem
? EVAL_SKIP
: noside
));
2077 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2078 return value_from_longest (type
,
2079 (LONGEST
) (!tem
&& !value_logical_not (arg2
)));
2082 case BINOP_LOGICAL_OR
:
2083 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2084 if (noside
== EVAL_SKIP
)
2086 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2091 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2094 if (binop_user_defined_p (op
, arg1
, arg2
))
2096 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2097 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2101 tem
= value_logical_not (arg1
);
2102 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
,
2103 (!tem
? EVAL_SKIP
: noside
));
2104 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2105 return value_from_longest (type
,
2106 (LONGEST
) (!tem
|| !value_logical_not (arg2
)));
2110 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2111 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2112 if (noside
== EVAL_SKIP
)
2114 if (binop_user_defined_p (op
, arg1
, arg2
))
2116 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2120 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2121 tem
= value_equal (arg1
, arg2
);
2122 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2123 return value_from_longest (type
, (LONGEST
) tem
);
2126 case BINOP_NOTEQUAL
:
2127 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2128 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2129 if (noside
== EVAL_SKIP
)
2131 if (binop_user_defined_p (op
, arg1
, arg2
))
2133 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2137 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2138 tem
= value_equal (arg1
, arg2
);
2139 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2140 return value_from_longest (type
, (LONGEST
) ! tem
);
2144 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2145 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2146 if (noside
== EVAL_SKIP
)
2148 if (binop_user_defined_p (op
, arg1
, arg2
))
2150 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2154 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2155 tem
= value_less (arg1
, arg2
);
2156 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2157 return value_from_longest (type
, (LONGEST
) tem
);
2161 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2162 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2163 if (noside
== EVAL_SKIP
)
2165 if (binop_user_defined_p (op
, arg1
, arg2
))
2167 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2171 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2172 tem
= value_less (arg2
, arg1
);
2173 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2174 return value_from_longest (type
, (LONGEST
) tem
);
2178 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2179 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2180 if (noside
== EVAL_SKIP
)
2182 if (binop_user_defined_p (op
, arg1
, arg2
))
2184 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2188 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2189 tem
= value_less (arg2
, arg1
) || value_equal (arg1
, arg2
);
2190 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2191 return value_from_longest (type
, (LONGEST
) tem
);
2195 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2196 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
2197 if (noside
== EVAL_SKIP
)
2199 if (binop_user_defined_p (op
, arg1
, arg2
))
2201 return value_x_binop (arg1
, arg2
, op
, OP_NULL
, noside
);
2205 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
2206 tem
= value_less (arg1
, arg2
) || value_equal (arg1
, arg2
);
2207 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2208 return value_from_longest (type
, (LONGEST
) tem
);
2212 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2213 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2214 if (noside
== EVAL_SKIP
)
2216 type
= check_typedef (value_type (arg2
));
2217 if (TYPE_CODE (type
) != TYPE_CODE_INT
)
2218 error (_("Non-integral right operand for \"@\" operator."));
2219 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2221 return allocate_repeat_value (value_type (arg1
),
2222 longest_to_int (value_as_long (arg2
)));
2225 return value_repeat (arg1
, longest_to_int (value_as_long (arg2
)));
2228 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2229 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2232 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2233 if (noside
== EVAL_SKIP
)
2235 if (unop_user_defined_p (op
, arg1
))
2236 return value_x_unop (arg1
, op
, noside
);
2239 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2240 return value_pos (arg1
);
2244 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2245 if (noside
== EVAL_SKIP
)
2247 if (unop_user_defined_p (op
, arg1
))
2248 return value_x_unop (arg1
, op
, noside
);
2251 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2252 return value_neg (arg1
);
2255 case UNOP_COMPLEMENT
:
2256 /* C++: check for and handle destructor names. */
2257 op
= exp
->elts
[*pos
].opcode
;
2259 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2260 if (noside
== EVAL_SKIP
)
2262 if (unop_user_defined_p (UNOP_COMPLEMENT
, arg1
))
2263 return value_x_unop (arg1
, UNOP_COMPLEMENT
, noside
);
2266 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
2267 return value_complement (arg1
);
2270 case UNOP_LOGICAL_NOT
:
2271 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2272 if (noside
== EVAL_SKIP
)
2274 if (unop_user_defined_p (op
, arg1
))
2275 return value_x_unop (arg1
, op
, noside
);
2278 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
2279 return value_from_longest (type
, (LONGEST
) value_logical_not (arg1
));
2283 if (expect_type
&& TYPE_CODE (expect_type
) == TYPE_CODE_PTR
)
2284 expect_type
= TYPE_TARGET_TYPE (check_typedef (expect_type
));
2285 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2286 type
= check_typedef (value_type (arg1
));
2287 if (TYPE_CODE (type
) == TYPE_CODE_METHODPTR
2288 || TYPE_CODE (type
) == TYPE_CODE_MEMBERPTR
)
2289 error (_("Attempt to dereference pointer to member without an object"));
2290 if (noside
== EVAL_SKIP
)
2292 if (unop_user_defined_p (op
, arg1
))
2293 return value_x_unop (arg1
, op
, noside
);
2294 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2296 type
= check_typedef (value_type (arg1
));
2297 if (TYPE_CODE (type
) == TYPE_CODE_PTR
2298 || TYPE_CODE (type
) == TYPE_CODE_REF
2299 /* In C you can dereference an array to get the 1st elt. */
2300 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
2302 return value_zero (TYPE_TARGET_TYPE (type
),
2304 else if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2305 /* GDB allows dereferencing an int. */
2306 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
2309 error (_("Attempt to take contents of a non-pointer value."));
2312 /* Allow * on an integer so we can cast it to whatever we want.
2313 This returns an int, which seems like the most C-like thing to
2314 do. "long long" variables are rare enough that
2315 BUILTIN_TYPE_LONGEST would seem to be a mistake. */
2316 if (TYPE_CODE (type
) == TYPE_CODE_INT
)
2317 return value_at_lazy (builtin_type (exp
->gdbarch
)->builtin_int
,
2318 (CORE_ADDR
) value_as_address (arg1
));
2319 return value_ind (arg1
);
2322 /* C++: check for and handle pointer to members. */
2324 op
= exp
->elts
[*pos
].opcode
;
2326 if (noside
== EVAL_SKIP
)
2328 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2333 struct value
*retvalp
= evaluate_subexp_for_address (exp
, pos
, noside
);
2338 if (noside
== EVAL_SKIP
)
2340 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
2343 return evaluate_subexp_for_sizeof (exp
, pos
);
2347 type
= exp
->elts
[pc
+ 1].type
;
2348 arg1
= evaluate_subexp (type
, exp
, pos
, noside
);
2349 if (noside
== EVAL_SKIP
)
2351 if (type
!= value_type (arg1
))
2352 arg1
= value_cast (type
, arg1
);
2357 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2358 if (noside
== EVAL_SKIP
)
2360 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2361 return value_zero (exp
->elts
[pc
+ 1].type
, lval_memory
);
2363 return value_at_lazy (exp
->elts
[pc
+ 1].type
,
2364 value_as_address (arg1
));
2366 case UNOP_MEMVAL_TLS
:
2368 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2369 if (noside
== EVAL_SKIP
)
2371 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2372 return value_zero (exp
->elts
[pc
+ 2].type
, lval_memory
);
2376 tls_addr
= target_translate_tls_address (exp
->elts
[pc
+ 1].objfile
,
2377 value_as_address (arg1
));
2378 return value_at_lazy (exp
->elts
[pc
+ 2].type
, tls_addr
);
2381 case UNOP_PREINCREMENT
:
2382 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2383 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2385 else if (unop_user_defined_p (op
, arg1
))
2387 return value_x_unop (arg1
, op
, noside
);
2391 if (ptrmath_type_p (value_type (arg1
)))
2392 arg2
= value_ptradd (arg1
, 1);
2395 struct value
*tmp
= arg1
;
2396 arg2
= value_one (value_type (arg1
), not_lval
);
2397 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2398 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2401 return value_assign (arg1
, arg2
);
2404 case UNOP_PREDECREMENT
:
2405 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2406 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2408 else if (unop_user_defined_p (op
, arg1
))
2410 return value_x_unop (arg1
, op
, noside
);
2414 if (ptrmath_type_p (value_type (arg1
)))
2415 arg2
= value_ptradd (arg1
, -1);
2418 struct value
*tmp
= arg1
;
2419 arg2
= value_one (value_type (arg1
), not_lval
);
2420 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2421 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2424 return value_assign (arg1
, arg2
);
2427 case UNOP_POSTINCREMENT
:
2428 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2429 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2431 else if (unop_user_defined_p (op
, arg1
))
2433 return value_x_unop (arg1
, op
, noside
);
2437 if (ptrmath_type_p (value_type (arg1
)))
2438 arg2
= value_ptradd (arg1
, 1);
2441 struct value
*tmp
= arg1
;
2442 arg2
= value_one (value_type (arg1
), not_lval
);
2443 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2444 arg2
= value_binop (tmp
, arg2
, BINOP_ADD
);
2447 value_assign (arg1
, arg2
);
2451 case UNOP_POSTDECREMENT
:
2452 arg1
= evaluate_subexp (expect_type
, exp
, pos
, noside
);
2453 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
2455 else if (unop_user_defined_p (op
, arg1
))
2457 return value_x_unop (arg1
, op
, noside
);
2461 if (ptrmath_type_p (value_type (arg1
)))
2462 arg2
= value_ptradd (arg1
, -1);
2465 struct value
*tmp
= arg1
;
2466 arg2
= value_one (value_type (arg1
), not_lval
);
2467 binop_promote (exp
->language_defn
, exp
->gdbarch
, &tmp
, &arg2
);
2468 arg2
= value_binop (tmp
, arg2
, BINOP_SUB
);
2471 value_assign (arg1
, arg2
);
2477 return value_of_this (1);
2481 return value_of_local ("self", 1);
2484 /* The value is not supposed to be used. This is here to make it
2485 easier to accommodate expressions that contain types. */
2487 if (noside
== EVAL_SKIP
)
2489 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2491 struct type
*type
= exp
->elts
[pc
+ 1].type
;
2492 /* If this is a typedef, then find its immediate target. We
2493 use check_typedef to resolve stubs, but we ignore its
2494 result because we do not want to dig past all
2496 check_typedef (type
);
2497 if (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2498 type
= TYPE_TARGET_TYPE (type
);
2499 return allocate_value (type
);
2502 error (_("Attempt to use a type name as an expression"));
2505 /* Removing this case and compiling with gcc -Wall reveals that
2506 a lot of cases are hitting this case. Some of these should
2507 probably be removed from expression.h; others are legitimate
2508 expressions which are (apparently) not fully implemented.
2510 If there are any cases landing here which mean a user error,
2511 then they should be separate cases, with more descriptive
2515 GDB does not (yet) know how to evaluate that kind of expression"));
2519 return value_from_longest (builtin_type (exp
->gdbarch
)->builtin_int
, 1);
2522 /* Evaluate a subexpression of EXP, at index *POS,
2523 and return the address of that subexpression.
2524 Advance *POS over the subexpression.
2525 If the subexpression isn't an lvalue, get an error.
2526 NOSIDE may be EVAL_AVOID_SIDE_EFFECTS;
2527 then only the type of the result need be correct. */
2529 static struct value
*
2530 evaluate_subexp_for_address (struct expression
*exp
, int *pos
,
2540 op
= exp
->elts
[pc
].opcode
;
2546 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2548 /* We can't optimize out "&*" if there's a user-defined operator*. */
2549 if (unop_user_defined_p (op
, x
))
2551 x
= value_x_unop (x
, op
, noside
);
2552 goto default_case_after_eval
;
2559 return value_cast (lookup_pointer_type (exp
->elts
[pc
+ 1].type
),
2560 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
));
2563 var
= exp
->elts
[pc
+ 2].symbol
;
2565 /* C++: The "address" of a reference should yield the address
2566 * of the object pointed to. Let value_addr() deal with it. */
2567 if (TYPE_CODE (SYMBOL_TYPE (var
)) == TYPE_CODE_REF
)
2571 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2574 lookup_pointer_type (SYMBOL_TYPE (var
));
2575 enum address_class sym_class
= SYMBOL_CLASS (var
);
2577 if (sym_class
== LOC_CONST
2578 || sym_class
== LOC_CONST_BYTES
2579 || sym_class
== LOC_REGISTER
)
2580 error (_("Attempt to take address of register or constant."));
2583 value_zero (type
, not_lval
);
2586 return address_of_variable (var
, exp
->elts
[pc
+ 1].block
);
2589 tem
= longest_to_int (exp
->elts
[pc
+ 2].longconst
);
2590 (*pos
) += 5 + BYTES_TO_EXP_ELEM (tem
+ 1);
2591 x
= value_aggregate_elt (exp
->elts
[pc
+ 1].type
,
2592 &exp
->elts
[pc
+ 3].string
,
2595 error (_("There is no field named %s"), &exp
->elts
[pc
+ 3].string
);
2600 x
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2601 default_case_after_eval
:
2602 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
2604 struct type
*type
= check_typedef (value_type (x
));
2606 if (VALUE_LVAL (x
) == lval_memory
|| value_must_coerce_to_target (x
))
2607 return value_zero (lookup_pointer_type (value_type (x
)),
2609 else if (TYPE_CODE (type
) == TYPE_CODE_REF
)
2610 return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2613 error (_("Attempt to take address of value not located in memory."));
2615 return value_addr (x
);
2619 /* Evaluate like `evaluate_subexp' except coercing arrays to pointers.
2620 When used in contexts where arrays will be coerced anyway, this is
2621 equivalent to `evaluate_subexp' but much faster because it avoids
2622 actually fetching array contents (perhaps obsolete now that we have
2625 Note that we currently only do the coercion for C expressions, where
2626 arrays are zero based and the coercion is correct. For other languages,
2627 with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
2628 to decide if coercion is appropriate.
2633 evaluate_subexp_with_coercion (struct expression
*exp
,
2634 int *pos
, enum noside noside
)
2643 op
= exp
->elts
[pc
].opcode
;
2648 var
= exp
->elts
[pc
+ 2].symbol
;
2649 type
= check_typedef (SYMBOL_TYPE (var
));
2650 if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
2651 && CAST_IS_CONVERSION
)
2654 val
= address_of_variable (var
, exp
->elts
[pc
+ 1].block
);
2655 return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2661 return evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
2665 /* Evaluate a subexpression of EXP, at index *POS,
2666 and return a value for the size of that subexpression.
2667 Advance *POS over the subexpression. */
2669 static struct value
*
2670 evaluate_subexp_for_sizeof (struct expression
*exp
, int *pos
)
2672 /* FIXME: This should be size_t. */
2673 struct type
*size_type
= builtin_type (exp
->gdbarch
)->builtin_int
;
2680 op
= exp
->elts
[pc
].opcode
;
2684 /* This case is handled specially
2685 so that we avoid creating a value for the result type.
2686 If the result type is very big, it's desirable not to
2687 create a value unnecessarily. */
2690 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2691 type
= check_typedef (value_type (val
));
2692 if (TYPE_CODE (type
) != TYPE_CODE_PTR
2693 && TYPE_CODE (type
) != TYPE_CODE_REF
2694 && TYPE_CODE (type
) != TYPE_CODE_ARRAY
)
2695 error (_("Attempt to take contents of a non-pointer value."));
2696 type
= check_typedef (TYPE_TARGET_TYPE (type
));
2697 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
2701 type
= check_typedef (exp
->elts
[pc
+ 1].type
);
2702 return value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
2706 type
= check_typedef (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
));
2708 value_from_longest (size_type
, (LONGEST
) TYPE_LENGTH (type
));
2711 val
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
2712 return value_from_longest (size_type
,
2713 (LONGEST
) TYPE_LENGTH (value_type (val
)));
2717 /* Parse a type expression in the string [P..P+LENGTH). */
2720 parse_and_eval_type (char *p
, int length
)
2722 char *tmp
= (char *) alloca (length
+ 4);
2723 struct expression
*expr
;
2725 memcpy (tmp
+ 1, p
, length
);
2726 tmp
[length
+ 1] = ')';
2727 tmp
[length
+ 2] = '0';
2728 tmp
[length
+ 3] = '\0';
2729 expr
= parse_expression (tmp
);
2730 if (expr
->elts
[0].opcode
!= UNOP_CAST
)
2731 error (_("Internal error in eval_type."));
2732 return expr
->elts
[1].type
;
2736 calc_f77_array_dims (struct type
*array_type
)
2739 struct type
*tmp_type
;
2741 if ((TYPE_CODE (array_type
) != TYPE_CODE_ARRAY
))
2742 error (_("Can't get dimensions for a non-array type"));
2744 tmp_type
= array_type
;
2746 while ((tmp_type
= TYPE_TARGET_TYPE (tmp_type
)))
2748 if (TYPE_CODE (tmp_type
) == TYPE_CODE_ARRAY
)